Cailyn Girl
How popular is Cailyn?
#3,711 girl name in 2025
40 baby girls were named Cailyn in the US in 2025, making it the 3711th most popular girl name. Another 5 boys got the name (#12,004 for boys).
Cailyn popularity over time
Boys Girls
| Rank in 2025 | #3,711 for girls (▼ 434 from 2024) |
|---|---|
| Babies in 2025 | 40 girls, 5 boys |
| 10-year trend | Falling fast (-77% babies vs 2015) |
| Earlier ranks | #1,337 in 2015, #2,468 in 2020 |
| Peak year | 2009 (401 girls) |
| Highest rank | #724 in 2009 |
| First recorded | 1979 |
| Boys vs girls (last 10 years) | 1% boys, 99% girls |
| Chance a classmate shares it | 0.0% in a class of 25 kids born in 2025 |
Cailyn counting every spelling
Social Security counts each spelling as its own name. Adding together the spellings that sound alike, the Kaylin family of names ranked #373 for girls in 2025 (#335 the year before), with 849 babies in all.
| Spelling | Girls in 2025 | Share |
|---|---|---|
| Kaylin | 126 | 15% |
| Kailyn | 110 | 13% |
| Kaylynn | 134 | 16% |
| Kailynn | 78 | 9% |
| Kaylen | 61 | 7% |
| Kaylyn | 70 | 8% |
| Cailyn | 40 | 5% |
| Kaylene | 37 | 4% |
| Kalynn | 15 | 2% |
| Cailynn | 17 | 2% |
| Kahlan | 10 | 1% |
| Kalyn | 19 | 2% |
Spellings are grouped by how they sound, using our own rules, so a few groupings may not match how your family says the name.
Where Cailyn is most popular
Babies named Cailyn per 1,000 girls born in each state, 2021 to 2025. Darker means more common.
- Georgia: 0.1 per 1,000 (17 girls)
- Alabama: 0.1 per 1,000 (5 girls)
- Pennsylvania: 0.0 per 1,000 (7 girls)
- Virginia: 0.0 per 1,000 (5 girls)
- Texas: 0.0 per 1,000 (22 girls)
Cailyn by decade
| Decade | Baby girls | Best rank |
|---|---|---|
| 1970s | 5 | #10,208 |
| 1980s | 120 | #3,478 |
| 1990s | 857 | #1,181 |
| 2000s | 2,445 | #724 |
| 2010s | 1,791 | #835 |
| 2020s | 331 | #2,468 |
Girl names about as popular as Cailyn
Questions
- Is Cailyn a boy or girl name?
- Cailyn is mostly a girl name. Over the last 10 years, 99% of babies named Cailyn were girls.
- How popular is the name Cailyn?
- 40 baby girls were named Cailyn in the US in 2025, making it the 3711th most popular girl name. Another 5 boys got the name (#12,004 for boys).
- When was Cailyn most popular?
- Cailyn peaked in 2009, when 401 girls were given the name. Its highest rank was #724 in 2009.
- How many people are named Cailyn?
- 5,554 babies have been named Cailyn in the US since 1880. We estimate about 5,503 of them are alive in 2026, with a median age of 18.
- Where is Cailyn most popular?
- From 2021 to 2025, Cailyn was most common in Georgia, at 0.1 of every 1,000 girls born there.
Source: Social Security Administration baby name data, 1880 to 2025 (names given to at least 5 babies of a sex in a year). Living-people and median-age figures are our estimates using US life tables. How we calculate.